US EPA

6861229 

Journal Article 

Self-sensing concrete-filled FRP tubes using FBG strain sensors - art. no. 64230M 

Yan, Xin; Li, Hui; , 

2007 

SPIE-INT SOC OPTICAL ENGINEERING 

BELLINGHAM 

M4230-M4230 

WOS:000254186300021 

Concrete-filled fiber-reinforced polymer (FRP) tube is a type of newly developed structural column. It behaves brittle failure at its peak strength, and so the health monitoring on the hoop strain of the FRP tube is essential for the life cycle safety of the structure. Herein, three types of FRP tubes including 5-ply tube, 2-ply tube with local reinforcement and FRP-steel composite tube were embedded with the optic fiber Bragg grating (FBG) strain sensors in the inter-ply of FRP or the interface between FRP and steel in the middle height and the hoop direction. The compressive behaviors of the concrete-filled FRP tubes were experimentally studied. The hoop strains of the FRP tubes were recorded in real time using the embedded FBG strain sensors as well as the embedded or surface electric resistance strain gauges. Results indicated that the FBG strain sensors can faithfully record the hoop strains of the FRP tubes in compression as compared with the embedded or surface electric resistance strain gauges, and the strains recorded can reach more than 7300 mu epsilon. 

Du, S; Leng, J; Asundi, AK; 

978-0-8194-6536-8 

International Conference on Smart Materials and Nanotechnology in Engineering 

Harbin, PEOPLES R CHINA